Island



(No Model.)

F. s. MAN TON. LOCKING GEAR FOR SHIPS WINDLASSES. No. 408,356. 7 Patented May 14, 1889.

N4 Pnzns. mammo ram. Washingtnn, a. c,

UNITED STATES PATENT OFFICE.

FRANK S. MANTON, OF PROVIDENCE, RIIODE ISLAND.

LOCKING-GEAR FOR SHIPS WINDLASSES.

SPECIFICATION forming part of Letters Patent No. 403,356, dated May 14,1889.

Application filed January 30, 1889. Serial No. 298,104. (No model.)

To aZZ whom it may concern.-

Be it known that I, FRANK S. MANTON, a citizen of the United States,residing at Providence, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements inLocking-Gear for Ship-YVin dlasses and I do declare the follow ing to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and to theletters and figures of reference marked thereon, which form a part ofthis specification.

My invention relates to windlasses, and its object is to modify thelocking-gear shown in Remington and Mantons patent, reissued June 1,1880, No. 9,233, so that the wildcat or drum can be driven positively ineither direction. In the patent referred to the lockingpawls all pointin the same direction, and are arranged to come in contact with but oneside of the thrust-blocks on the rim of the wildcat, so that the lattercan be positively driven in one direction only.

In steam-windlasses it is sometimes desirable to be able to positivelydri e the Wildcat backward, for the purpose of paying out cable orslacking the strain on a hawser. When a steam Windlass fitted with theabove described patented locking-gear' is reversed, the inclined back ofeach locking-pawl is crowded against the thrust-block next behind it,thereby bringing the entire strain on the pin by which the pawl isthrown up or down, at the imminent risk of breaking it. In order toavoid this danger, I have invented the locking-gear hereinafterdescribed, and illustrated in the accompanying drawings, in which-Figure 1 is a frontview of the locking-ring, the pawls being shown indotted lines. Fig. 2 is an end view of the driving-head and wildcat rim,partly in section; and Fig. 3 is a longitudinal section through thedriving-head and wildcat.

The same reference-letters indicate corresponding parts.

The rim of the wildcat A is provided with two or more thrust-blocks, a,of the usual shape. I prefer to use three of these blocks, though thenumber is immaterial. The locking-pawls b in the driving-head Bpreferably correspond in number with the thrust-blocks, as shown. Whenthree pawls are used, one of them, I), is faced in the oppositedirection to the others, the'corresponding slot, 0, in the locking-ring0 being shifted out of its place and brought a pawls length nearer toone of the other slots, 0, as clearly shown in Fig. 1. Vhen the ring isturned, all the pawls are moved in or out simultaneously by means of thepins D, as in the Remington and Manton patent but when the driving-headis rotated to take in the chain only two of the pawls b engage with thethrust-blocks a, as shown.

the blocks next behind them. It will thus be seen that the pawls are allcontrolled by the locking ring, a single movement of which throws themin or out, as in the patent referred to; but that the pawls are soarranged that a portion of them operate to drive the wildcat in onedirection when taking in chain, and the remainder operate to drive thewildcat in the opposite direction to pay out or slack off the cable.

As shown and described, it is preferable to have most of the pawlsarranged to drive when taking in the cable, since that service is moresevere than simply slacking off the chain, and subjects the Windlass toa far greater strain.

I am aware that it has been proposed to positively drive a capstanforward and backward alternately by means of two sets of pawls, one setbeing held out of position to engage with the ratchet-teeth on thecapstan when the other set was to be used; but I am not aware that twosets of pawls have been simultaneously moved into or out of position, sothat in the former case either one set or the other could come intoplay, according to 5 The third pawl, 6', lies between two of the I thedirection in which the driving-gear was rotated, while in the lattercase neither set would operate.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

1.. The combination, with a wildcat loosely mounted on a Windlass-shaft,of a driving head rigidlyseeured to the shaft and provided withlocking-pawls to engage with the wildcat, a portion of them beingadapted to drive it in one direction and the other portion bcin adaptedto drive it in the other direction, substantially as described, and aslotted ring for simultaneously moving all the pawls into or out ofposition to engage with the wildcat.

2. The combination, with a wildcat loosely mounted on a Windlass-shaftand provided with thrust-blocks, ot a driving-head rigidly secured tosaid shaft and carrying lockingpawls, some of which are adapted toengage with one face of the thrust-blocks and drive the wildcat in onedirection, while the others are adapted to engage with the opposite faceof the thrust-blocks and drive the wildcat in the opposite direction,and a slotted ring for simultaneously moving all the pawls into or outof position to engage with the thrustbloeks, substantially as described.

The combination, with the driving-head 3, having the oppositely-disposedlockingpawls I) Z), of the ring (1, having the cam-slots c 0', adaptedto throw all. the pawls in or out simultaneously, substantially asdescribed.

4. The combination, with the wildcat A, having the thrust-blocks a, of;the drivinghead B, carrying the locking-pawls I), engaging with one faceof the blocks a, and the pawl Z), projecting between two thrust-blocks,in position to engage with the opposite face of one of them when themotion of the drivinghead is reversed, substantially as described.

In testimony whereof I atfix my signature in presence of two witnesses.

FRANK SQ MANTON.

Witnesses:

II. B. ZEVELY, II. B. HITZ.

